Year	Percent
1982	2.7
1983	3.3
1995	2.82
1996	2.47
1997	2.24
1998	3.14
1999	3.5
2000	2.97
2001	3.39
2002	3.31
2003	3.6
2004	3.4
2005	3.44
2006	3.29
2007	3.11
2008	3.16
2009	3.64
2010	3.15
2011	2.91
2012	2.96
2013	2.92
2014	2.67
2015	2.92
2016	3.13